Excavating apparatus



Aug. 13, J W PAGE EXCAVATING APPARATUS Filed Jan. 30, 1928 cfa/z/z// 6 v g I Patented Aug. 13, 1929.

UNIT-EDI STATES JOHN 'W'. PAGE, OF CHICAGO, ILLINOIS.

EXCAVATING APPARATUS.

Application lmrl January 30, 1928. Serial No. 250,447.

This invention relates to improvements in excavating apparatus, and more especially such apparatus adapted for digging trenches and sometimes referred to as a trench hoe. My improved apparatusl will be fully disclosed in the'fqllowing specification and accompanyingr drawings.

lIn that form of device embodying the features of my invention shown in the drawings, Figure 1 is a view in side elevation, Fig. 2 is a fragmentary view on an (not shown) which may be any suitable motor. 13 indicates a suitable housing for the mechanism mounted on the platform 10, and the o erator.

Pivotally attached at -14 to the front of the platform 10 in the usual manner is a boom 15. 16, 16 indicate suitable stay members.

17 indicates a bucket-arm pivotally attached to the end of the boom 15 at 18, such point of attachment being a short distance below the upper end of the arm 17. The

'lowerpend of the arm 17 is forked as indi'- cated by 17 a, the prongs of the forks carrying pivotally mounted therebetween a bucket 19 which may be the generaltype of Page bucket now in common use in excavating apparatus. The pivot points at which the bucket 19 is carried bythe end of the arm are indicated by 20, 20 and these pivot points preferably are in front of the center of gravity of the bucket.

21 indicates'an A-frame mounted on the platform' l0 with a double fsheave 22 at its apex. The upper end of the arm 17 ,is also provided with a `double slieave 23. The bucket 19 is provided with a rearwardly ex'- tending arm 24, the end of said arm as indicated by 24 lying behind the pivot point 20 and preferably behind the center of gravity of the bucket. y

25 indicates a boom line having one. end

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attached to the winch or winding drum 25a on the platform 10. This line 25 extends from the winding drum 25a up over one of the sheaves at the top of the A-frame, thence around one of the sheaves 23 at the upper end of the arm 17, thence back around the other sheave 22, thence over the other sheave 28 and downwardly aralle'l with the arm 17 where its other end 1s attached at 24a to the arm 24 on the bucket. y

26 indicates a loading-line attached to the front of the shovel 26", preferably by means of a bridle chain 261. The other end of the loading-line 26 passes over the roller 27 and under the roller 28 and thence is led to the winch or winding drum 29 mounted on the platform 10.

The operation is as follows. With the arm and boom pretty well extended the end of the arm is permitted to drop. The loadingline is left somewhat slack so that the bucket descends cutting-edge rst. The bucket is then hauled in by the loading-line and the loading is greatly facilitated because most of the weight of the boom and arm is concentrated at a point almost directly over the cutting-edge. After the bucket has been filled, tension is maintainedon the loadingline and the boom-line is hauled in to move the bucket upwardly `and outwardly. By maintaining tension on the loading-line the bucket remains in horizontal position thus preventing the load from being dumped. As the armapproaches a horizontal position, however, as shown by the broken lines in Fig. 1, the strain on the boom-line 25' in creases thus pulling harder on the arm 24y and tending to dump the bucket. The exact time at which the bucket is to be dumped may be determined by the operator. He

mi? haul in on the boomline until there is` su cient tension on the same to overcome the tension on the loading-line; or, he may cause the bucket to dump somewhat soorier by slacking away slightly on the loading-line. In other words, the boom-line tends to hold it in horizontal or load-retaining position The operator may control these two lines to cause the dumping to occur when he wishes. It will be seen, however, that the manipulation is rather simple because when the bucket has been filled' and the arm is almost in vertiosition but slight tension on the load-A ingine will overcome the pull on theboomline and maintain the bucket in load-retaining position." As the bucket is raised and moved outwardly by hauling in the boomd line the tension on the, boom-line continues to increase. That'is, as the arm 17 gets higherfand approaches thehorizontal position'l the tension on .the boom-line 25 increases until finally' -the normal tension on the loading-line'will automatically be overcome thus causing the bucket to dum without any particular manipulation y the operator. Y

My improved excavating -apparatus is a great improvement over t 1e ordinary type of trench hoe now in common use.in which the bucket islrigidly mounted on the arm. In such devices, as the arm goes backwards the load commences to spill as soon as the bucket begins to moveout of itshorizontal positiom- Also, my improved excavating device is adapted to dig to a greater de th than those of the old type just mentionedi While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made Without departing from the spirit and scope of the invention disclosed in the appended claims, in which it is my intention to claim all novelty in my invention as broadly as possible in view of the prior art'.

What I claim is new, and desire to secure by Letters Patent, is:

1. Excavating apparatus comprising; a platform; a boom pivotally attached to the platform; a bucket-arm pivotally attached to the outer end of the boom, said pivotal attachment being below the upper end of said bucket-arm; a bucket pivotally mounted on ythe lower end of the bucket-arm, and

' adapted to rotate on said 'pivot from horit attachment being zontal load-retaining position to vertical dumping osition; a loading-line attached to the buc et in front of its pivotal attachment to the'bucket-arm, whereby tension on said loading-line tends to hold said bucket in horizontal load-retainingl position; means on the platform for hauling in the loadingline; a boom1ine leading from the platform to the upper endY of the bucket-arm and thence tothe bucketthe end of said. boomline being Iattached to said bucket behind the pivotal attachment between said bucket and the Ibucket-arm, whereby tension on said boom-line tends to rotate the bucket to vertical dumping position; and means von the platformv for hauling in the boom-line.

2. Excavating ap aratus comprising; a platform;-a boom pivotally attached to the platform; a bucket-arm pivotally attached to the outer end of the boom, said pivotal below the upper end of said bucket-arm; a bucket pivotally mounted on the lower end of the bucket-arm and adapted to rotate on sald pivot from horiattached to the bue zontal load-retaining position to vertical umping position; a loading-line attached to the bucket; means on the platform for hauling in the loading-line.; a boom-line leading from the platform to the upper end of the bucket-arm and thence to the bucket; means on the platform for hauling in the boom-line;and means for rotating the bucket on its pivotal attachment to the bucketarm from horizontal load-retaining position to vertical dumping position, said means being operated by tension on the boom-line.

3. Excavating apparatus comprising; a platform; a boom pivotally attached to the platform; a bucket-arm pivotally attached to the outer end of the boom, said pivotal attachment being 'below the upper end of said bucket-arm; a bucket pivotally mountcd on the lower end of the bucket-arm and adapted to rotate on said pivot from horizontal load-retaining position to vertical dumping position; aloading-line attached to the bucket, tension on said loading-line tending to hold said bucket in horizontal load-retaining position; means on the platform for hauling in the loading-line; a boom-line leading from the platform to the upper end of the bucket-arm and thence to the bucket; means on the platform for hauling in the boom-line; and means for rotating the bucket on its pivotal attachment to the bucket-arm from horizontal load-retainingposition to vertical dumping position, said means being operated by tension on the boom-line.

4. Excavating apparatus comprising; a platform; a boom pivotally attached to the platform; a bucket-arm pivotally attached to the outer end of the boom; a bucket pivotally mounted on the lowerl end of the bucket-arm, and free'to rotate on said pivot from horizontal load-retaining position to vertical dumping position except as held by tension on theloading line; a loading-line attached to the bucket, tension on said loading-line tending to hold said bucket in horizontal load-retaining position; means on the platform for hauling in the loading-line; means for lifting the lower end of the bucket-arm with the bucket; and means for tating the bucket on its pivotal attachment to the bucket-arm from horizontal load-retaining position to vertical dumping position.

5. Excavating apparatus comprising; a platform; a boom pivotally attached to the platform; a bucket-arm pivotally attached to the outer end of the boom; a bucket pivotal` ly mounted on the lower end of the bucketarm and adapted to rotate on said pivot from horizontal load-retaining position to vertical dumping sition; a loading-line 'et; means on the plat-- the loading-line; a line end of the bucket-arm form for hauling in for lifting the lower lll) with the bucket, said line having its outer end attached to the bucket; and means for rotating the bucket on its pivotal attachment to the bucket-arm Afrom horizontal load-retaining position to vertical dumping position, said means operated by. tension on the line for lifting the lower end of the buck- 6. Excavating apparatus comprising; a platform; a boom pivotallyattached to the platform; a bucket-arm pivotally attached to the .outer end'of the boom; a bucket pivotally mounted on the lower end ofthe bucket-arm and adapted to rotate on said pivot from horizontal load-retaining position to vertical dumping position; a loading-line attached to the bucket, tension on said loading-line` tending to' hold the bucket in horizontal load-retaining position; means on the platform for hauling in the loading-line; a

line for lifting the lower end of the bucketarm with the bucket, said line having its outer end attached to the bucket; and means for rotating the'bucket on its pivotal attachment to 'the bucket-arm from horizontal loading-retaining position to vertical dumping position, saidmeans .operated by tension on the line for lifting the lower endy of the bucket-arm. l ,Y

7. In combination with suitable windlng machinery, a trunnioned boom, a vbucket arm rotating about a point in the boom, a bucket said line' tendin trunnioned on the bucket arm, a loading line attachedto the bucket and adapted to rotate and maintain the bucket in a loadlcarrying position, and-a boom line having y one end|attached to the bucket and adaptedV platform; a bucket-arm pivotally attached to the outer end of the boom; a bucket pivotally .mounted on the lower end of the bucket-arm; a loading line attached to the bucket, tension on said loading line tending to hold said bucket. 'in horizontal load-retaining position, said 'bucket being free'to rotate on its pivotV from horizontal load-retaining position to vertical dumping position, except as held by tension on said loading line; means on the .platform for hauls ing in "the loading line; means for lifting the lower end of the bucket-arm with the bucket, said means including a. line having one end attached tothe bucket, tension on to rotate said bucket on its pivotal attac ment to vertical dumping position; and means on the platform for iauling in said last-mentioned line.

In witness whereof, I have hereunto set my hand this 27th day iof January, 1928.

JOHN W, PAGE. 

